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<p>CablesExtension and Compensating Cables</p> <p>Catalog</p> <p>10-7.20 EN</p> <p>Page</p> <p>Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2General information . . . . . . . . . . . . . . . . . . . . . . Materials for extension and compensating cables . . . . . . EMF, tolerances and temperature ranges . . . . . . . . . . . Standardized materials and colour codes . . . . . . . . . . . Tolerances and temperature ranges according to DIN 43 722 Tolerances of external dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 2 3 4 4</p> <p>Insulating Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Effective Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Insulation resistance . . . . . Test voltages . . . . . . . . Inductivity . . . . . . . . . . Tolerance of loop resistance . Marking of pairs . . . . . . . Loop resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6 6 6 6 6</p> <p>Computer Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Types of interference voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Remedies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7</p> <p>Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Earthing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Installation of Shielding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Compensating Cables for Explosion-proof Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Cable types . . . . . . . . . . . . . . . . . . Installation . . . . . . . . . . . . . . . . . . . Permissible traction . . . . . . . . . . . . . . Supplementary length . . . . . . . . . . . . . Control . . . . . . . . . . . . . . . . . . . . . Cable bedding . . . . . . . . . . . . . . . . . Permissible temperature ranges for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 10 10 10 10 10 10</p> <p>Delivery Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Technical Terms of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Fibreglass-insulated Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 PVC-insulated Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Silicone rubber-insulated Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Teflon-insulated Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Copper Cables Copper Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29</p> <p>05.99</p> <p>1</p> <p>CablesExtension and Compensating Cables Introduction - MaterialsGeneral Information An electrical temperature measuring system with a thermocouple as the measuring sensor consists essentially of the thermocouple with the measuring point, the hot junction, a reference point with a known temperature, the cold junction, and a voltmeter. The temperature difference between the hot junction and the cold junction is measured. The cold junction temperature must, therefore, be known in order to be able to make a statement about the temperature at the hot junction. It is expedient to ensure that the cold junction temperature is kept at a constant value by means of suitable measures (ice water, thermostat). The leads from the cold junction to the measuring instrument are of normal copper wire. Often it is necessary to arrange the cold junction at some distance from the hot junction for reasons of design, finance or safety. In other cases, the measuring circuit is installed permanently and the actual thermocouple is designed as a measuring insert so that it can easily be replaced. It is then necessary to have a connection cable between the thermocouple and the cold junction with the same thermoelectric properties as the thermocouple itself. This connection is the compensating or extension cable. Materials for Extension and Compensating Cables according to DIN 43 722 We distinguish between original materials for extension cables and substitute materials for compensating cable. Extension wires of original materials are made of the same material as the accompanying thermocouple and can be used for measurements up to 200 C (type TX DIN 43 722 only up to 100 C). Compensating wires of substitute materials consist of alloys which are not identical to the accompanying thermocouple. However, within the permissible temperature range for compensating cables (see DIN 43 722), they have the same thermoelectric properties as the accompanying thermocouple. Substitute materials are used for the thermocouples type K and N and for the precious metal thermocouples type R, S and B, as the thermal material in these thermocouples consists of very expensive materials and the substitute materials are considerably cheaper. Another positive property of the substitute materials, namely the lower ohmic resistance, is no longer significant today. Modern electronic measuring instruments have a very high input resistance so that cable resistances in the thermocouple measuring circuit cause no significant measuring error even at values of several kiloohms. The table on the next page provides an overview of the standards, materials and color coding of extension and compensating cables. EMF, Tolerances and Temperature Ranges</p> <p>Catalog</p> <p>10-7.20 EN</p> <p>Wires for extension and compensating cables are standardized in DIN 43 713 or 43 712. The EMF in the permissible temperature range corresponds to the EMF for the thermocouples according to DIN EN 60 584-1. Tolerances for extension and compensating cables are specified in DIN 43 722. There are two accuracy classes. The narrower accuracy class 1 is only supplied for extension cables, i.e. cables with original materials. Class 2 applies to both extension cables and compensating cables. The extension and compensating cables in this catalog comply with DIN 43 722, in terms of color coding, apart from extension cables type U and L, which are coded according to DIN 43 714. The tolerances comply with accuracy class 2 according to DIN 43 722. The tolerance according to DIN 43 710 of 3 C applies to thermocouples of types U and L. Extension cables in accuracy class 1 are available on request. For thermocouple type B, copper conductors can be used in the temperature range up to 100 C. Therefore no tolerances are specified in DIN 43 722 for type B. Within the range from 0 C to 100 C is to be expected a maximal additional tolerance of 40 V corresponding 3.5 C (at measuring point temperature 1400 C). If compensating cables have to be used for type B at high temperatures, it is necessary to use a special compensating cable. These cables are available on request.</p> <p>2</p> <p>05.99</p> <p>CablesExtension and Compensating Cables Standardized Materials and Color CodesStandard Type of thermocouple Material for compensating or extension cable negative CuNi CuNi CuNi Ni Ni Ni NiSi NiSi Pt Pt Pt6Rh CuNi CuNi CuNi Ni Pt Pt6Rh CuNi CuNi CuNi Ni Ni Ni Pt Pt6Rh CuNi CuNi Ni Pt CuNi CuNi CuNi Ni Ni Pt Code TX EX JX KX KC A KC B NX NC RC A/SC A RC B/SC B BC TX EX JX KX RX/SX BX TX/C EX/C JX/C KX/C VC WC SC BC positive Cu NiCr Fe NiCr Fe Cu NiCrSi E-Cu E-Cu E-Cu CuMn Cu NiCr Fe NiCr E-Cu CuMn Cu NiCr Fe NiCr Cu Fe E-Cu CuMn Cu Fe Fe E-Cu Cu Fe NiCr NiCr E-Cu E-Cu negative CuNi CuNi CuNi Ni CuNi CuNi NiSi CuNiMn CuNiMn CuNiMn E-Cu CuNi CuNi CuNi Ni CuNiMn E-Cu CuNi CuNi CuNi Ni CuNi CuNi CuNiMn E-Cu CuNi CuNi CuNiMn CuNiMn CuNi CuNi CuNi Ni CuNiMn CuNiMn Colour code Insulation positive brown violet black green green green pink pink orange orange grey blue purple white yellow black grey yellow yellow yellow yellow yellow yellow yellow yellow red red red red white yellow brown brown white white negative white white white white white white white white white white white red red red red red red blue orange black violet brown white green grey brown blue green white blue blue blue blue blue blue</p> <p>Catalog</p> <p>10-7.20 EN</p> <p>Sheath</p> <p>Type DIN 43 722 -1994 JIS C1610 -1995 T E J K K K N N R/S R/S B ANSI MC 96.11982 T E J K R/S B NF C42-3241985 T E J K K K R/S B DIN 43 714 U -1979 L K R/S BS 4937 T J E K K R/S</p> <p>positive Cu NiCr Fe NiCr NiCr NiCr NiCrSi NiCrSi Pt13/10Rh Pt13/10Rh Pt30Rh Cu NiCr Fe NiCr Pt13/10Rh Pt30Rh Cu NiCr Fe NiCr NiCr NiCr Pt13/10Rh Pt30Rh Cu Fe NiCr PtRh Cu Fe NiCr NiCr NiCr PtRh</p> <p>brown violet black green green green pink pink orange orange grey blue purple black yellow green grey blue orange black violet brown white green grey brown blue green white blue black brown red red green</p> <p>05.99</p> <p>3</p> <p>CablesExtension and Compensating CablesTolerances and Temperature Ranges acc. to DIN 43 722 The following table shows the specified tolerances for extension cables and compensating cables when used at temperatures within the ranges indicated as Cable temperature range. The table also includes, in parentheses, the approximate equiva-</p> <p>Catalog</p> <p>10-7.20 EN</p> <p>lent tolerances in degrees Centigrade. As thermocouple EMF-temperature relationships are non-linear, the tolerance in degrees Centigrade depends on the temperature of the measuring junction of the thermocouple. The figures shown in the table for the specified tolerances in degrees Centigrade are appropriate for the measuring temperatures in the final column.</p> <p>Type</p> <p>Accuracy class Class 1 Class 2 140 V ( 2.5 C) 60 V ( 1.0 C) 200 V ( 2.5 C) 100 V ( 2.5 C) 100 V ( 2.5 C) 100 V ( 2.5 C) 100 V ( 2.5 C) 100 V ( 2.5 C) 30 V ( 2.5 C) 60 V ( 5.0 C) 30 V ( 2.5 C) 60 V ( 5,0 C) 40 V ( 3.5 C)</p> <p>Cable temperature range -25 C up to +200 C -25 C up to +100 C -25 C up to +200 C -25 C up to +200 C -25 C up to +200 C 0 C up to +150 C 0 C up to +100 C 0 C up to +150 C 0 C up to +100 C 0 C up to +200 C 0 C up to +100 C 0 C up to +200 C 0 C up to +100 C</p> <p>Measuring junction temperature 500 C 300 C 500 C 900 C 900 C 900 C 900 C 900 C 1000 C 1000 C 1000 C 1000 C 1400 C</p> <p>JX TX EX KX NX KCA KCB NC RCA RCB SCA SCB BC</p> <p> 85 V ( 1.5 C) 30 V ( 0.5 C) 120 V ( 1.5 C) 60 V ( 1.5 C) 60 V ( 1.5 C) </p> <p>Tolerances of the External Dimensions The table shows the tolerances of the outer diameters for the insulation used in this catalogue for the extension and compensating cables. Type Nominal dimensions (mm) up to 2.99 mm 3 - 5.99 mm JJ oval cables GLGL SL/SLGL TT outside braid round cables 0.15 0.20 0.20 0.15 0.30 0.15 0.20 0.30 0.30 0.20 0.40 0.20 6 - 9.99 mm 0.30 0.40 0.40 0.30 0.50 0.30 10 - 14.99 mm 15 - 19.99 mm 20 - 29.99 mm 0.40 0.50 0.80 For all nominal dimensions indicated in the catalogue, the following tolerances are valid (all dimensions in mm):</p> <p>4</p> <p>05.99</p> <p>CablesExtension and Compensating Cables Insulating MaterialsThe choice of insulating material is mainly determined by its type of application. Very often insulating materials are needed for higher temperatures (200 C and higher), as the cables must be led into close vicinity to the measuring junction, or laid through hot zones. Compensating cables for underground installation require particular conditions with regard to protection against humidity.</p> <p>Catalog</p> <p>10-7.20 EN</p> <p>The following table gives a summary of the characteristics of the most important insulating materials. The values should be considered only as reference values, and should not be used as minimum requirements in specifications.</p> <p>Reference Values for the most important Characteristics of Insulating Materials of Compensating Cables PVC normal Dielectric coefficient Resistivity at 20 C Tensile strength Max. operating temperature Specific weight Admissible radiation dose at 25 % damage Inflammability Water absorption Suitability in steam weak alkaline solutions chemical resistance to weak acids alcohol gasoline benzene mineral oil A = self-extinguishing B = non-combustible r 5.5-6.5 cm 1012 kN 1250 C 70 g/cm3 1.3 rad 108 A little good + + + + + PVC heatresistant 5.0-6.0 1014 1250 105 1.3 108 A little good + + + + + Silicone rubber 2.3 &gt; 1014 400 200 1.15 - 1.3 4 106 A little partially resistent + + + + Chloroprene rubber 3 109 - 1012 1000-2500 80 1.35 - 1.65 5 107 A little goo...</p>